Meanwhile, here is a nail design that I did that wasn't something I would make in to a tutorial, but I thought they were pretty funny.
Pinky - Addition
Ring - Subtraction
Pointer - Division
Thumb - Pi
Heh heh, just showing you my nerdy side. (Btw, if I memorized the first 20 numbers of pi, does that make me a nerd?!) Haha, anyways....